MRCOOL MEWH40S82S1

This site calculated the 3,531 kWh figure; it does not come from the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, of 0.92 with the daily hot-water draw that the DOE test sets for the medium draw pattern. The registry values come from the DOE CCD, retrieved 2026-09-19. The figure applies only at that test draw. A household that uses more hot water than the medium draw pattern assumes will use more than 3,531 kWh a year. A household that uses less will use less. The steps behind this figure are set out in how this site calculates annual energy and cost.

The registry lists a rated volume of 37 gallons and a first hour rating, the gallons of hot water available in the first hour from a full tank, of 55 gallons. At the medium draw pattern, its energy use of 3,531 kWh matches the class median of 3,531 kWh, a difference of 0 kWh. It ranks 213th lowest of 426 electric tank models registered at this draw pattern. So it sits in the middle of its class, neither above nor below the median. Its rated figures apply to a household whose daily use is close to the medium draw pattern. The registry does not state a household size limit. A home with higher peak demand should compare that demand with the 55-gallon first hour rating.

This text gives no running cost. What 3,531 kWh of electricity costs depends on your own utility tariff, and rates vary by utility and plan. The running-cost calculator for your ZIP applies your local electricity rate to this model's 3,531 kWh. Because this model sits at the class median, a same-class model rated at 3,531 kWh would cost the same on the same rate. The installed-price range on this page appears in its own block with its source and date. It is a modeled installed-cost range, not a quote. To check other electric tank models at the medium draw pattern, use find a same-class replacement by model number.